Call for testing: CPU load after sleep on Dell XPS-13 (BZ 1847627)

[Ben Cotton]

Hi folks,

We accepted RHBZ 1847627[1] as a Prioritized Bug today. The TL;DR is
that at least some people have observed high CPU loads when returning
from sleep. It seems libinput is sending a storm of zero-value
timestamps every millisecond until the touchpad is...touched.

If anyone can reproduce this, your input on the bug would be very
helpful. If you have a Dell XPS-13 and cannot reproduce this, that is
also good to know.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1847627

[Michel Alexandre Salim]

On Wed, 2021-04-21 at 14:05 -0400, Ben Cotton wrote:
> Hi folks,
>
> We accepted RHBZ 1847627[1] as a Prioritized Bug today. The TL;DR is
> that at least some people have observed high CPU loads when returning
> from sleep. It seems libinput is sending a storm of zero-value
> timestamps every millisecond until the touchpad is...touched.
>
> If anyone can reproduce this, your input on the bug would be very
> helpful. If you have a Dell XPS-13 and cannot reproduce this, that is
> also good to know.
>
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=1847627

Huh, I have that laptop and I do see that issue, didn't think too much
about it until now. I'll see if I can provide some details.

Regards,

[Leander Hutton]

On 4/21/21 2:05 PM, Ben Cotton wrote:
> If anyone can reproduce this, your input on the bug would be very
> helpful. If you have a Dell XPS-13 and cannot reproduce this, that is
> also good to know.
>
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=1847627

No luck here on a 9310 (only supports s2idle) and a 9300 I have access to (I can force it into deep, but defaults to s2). Both wake from sleep normally. I cannot reproduce.

Leander